Had XM for a year in the car, then kept hearing Sirius's "First Wave" station at a local restaurant we frequently dine at. I told dh I had to have Sirius instead! Just sold me on that one station alone. There's no stations like that on XM, Ethel and Lucy don't come close. That's about the closest you get to "alternative" from the 80's. Plus there are SEVERAL other rock related stations on Sirius which has XM beat by a mile. If you like Rock and 80's type music you'll prefer Sirius. (just wish I could use my XM antenna as it does drift off sometimes because I keep the antenna inside the car on the back window ledge).